Biological Classification – NEET Biology MCQs (Part 1)

Correct Answer: C

Humans have been interested in understanding and classifying living organisms since the dawn of civilisation. Early classifications were mainly based on the usefulness of organisms to humans.

Correct Answer: B

In the early days of civilisation, humans classified organisms instinctively based on their usefulness rather than scientific criteria. Plants and animals were grouped according to how they could provide food, shelter, clothing, or other basic needs.

Correct Answer: C

Aristotle was one of the earliest scientists to attempt a scientific method for classifying living organisms. He classified animals based on characteristics such as habitat and the presence or absence of red blood.

Correct Answer: B

Aristotle attempted one of the earliest scientific classifications. He used simple morphological characters, such as the physical structure and growth form of plants, to classify them into trees, shrubs and herbs.

Correct Answer: C

Aristotle classified animals into two groups based on the presence or absence of red blood. Animals with red blood were called 'enaima', while those without red blood were called 'anaima'.

Correct Answer: A

During the time of Carolus Linnaeus, organisms were classified into two main kingdoms: Plantae and Animalia. The kingdom Plantae included all plants, while the kingdom Animalia included all animals.

Correct Answer: B

The two-kingdom system of classification grouped all organisms into Plantae and Animalia. However, it did not differentiate between prokaryotes (organisms without a true nucleus) and eukaryotes (organisms with a true nucleus).

Correct Answer: B

The two-kingdom system classified all organisms into Plantae and Animalia. However, it failed to differentiate between eukaryotes and prokaryotes as well as unicellular and multicellular organisms.

Correct Answer: A

The two-kingdom system classified all organisms into Plantae and Animalia. However, it did not distinguish between eukaryotes and prokaryotes, unicellular and multicellular organisms, and photosynthetic organisms like green algae and non-photosynthetic organisms like fungi.

Correct Answer: B

The two-kingdom system divided organisms into Plantae and Animalia. Although this classification was simple and easy to understand, many organisms did not fit properly into either group, creating difficulties in classification.

Correct Answer: B

The two-kingdom classification system divided organisms into Plantae and Animalia. Although it was simple and easy to understand, many organisms did not clearly belong to either group. Because of this limitation, the two-kingdom system was later considered inadequate.

Correct Answer: A

Modern classification of organisms is not based only on external morphology. Scientists also consider other important features such as cell structure, nature of cell wall, mode of nutrition, habitat, methods of reproduction and evolutionary relationships to classify organisms more accurately.

Correct Answer: B

Classification systems have changed over time because scientists discovered new information about organisms, including their cell structure, nutrition, reproduction, and evolutionary relationships. This new knowledge helped improve and refine the classification of living organisms.

Correct Answer: C

R.H. Whittaker proposed the Five Kingdom Classification in 1969. In this system, living organisms were classified into five kingdoms based on characteristics such as cell structure, body organization, mode of nutrition, reproduction, and evolutionary relationships.